package main

import "fmt"

func main() {
	a := 58
	fmt.Println("函数调用之前 a 的值：", a)
	fmt.Printf("%T \n", a)
	fmt.Printf("%X \n", &a)

	//b := &a
	var b *int = &a
	change(b)
	fmt.Println("函数调用之后a的值：", a)
}

func change(val *int) {
	*val = 15
}
